Geology and Natural History. 323 | 
ume, while not, as the author says, a monograph of this group of 
fossid corals, contains a historical and critical review of previous 
ie ; ‘ ; 
lishers in its m sry: and will be welcomed especially by 
American paleontologist 
6. Ulenite in California; Note by W. P. Brake. (Communi- 
cated.)—Ulexite occurs in quantity in Kern County, California, in 
the bed of an extensive “salt marsh,” a few miles north of De sert 
Wells, and twenty miles from Mojave Station on the railway. 
1. Worked Shells in New England Shell-Heaps ; by Epwarp 
S. Morse.—Mr. Mises called attention to the fact that hereto- 
a A similar absence of worked shells had been noticed 
in the Japanese seyret Worked shells were — uncommon 
in the shell-heaps of ib and California. Mr. Morse then 
exhibited specimens of the large beach cockle Gunains which 
showed unmistakable we of having been worke 
consisted in bao out a portion of the outer whorl near the 
suture. To show that this portion could not be artificially broken 
he exhibited naturally broken shells of the same species, both 
recent and ancient, in which the fractures were entirely unlike 
the worked shells. — Abstract“ of paper read before the Amer, 
3 at Cincinnati. 
Changes in Mya and L panic Ayieei the deposition _ the 
New England Shell-Heaps ; by Evwaxrv 8. Morsx.—This com- 
munication embraced a comparison twee the shells peoniay to 
the ancient deposits made by the Indians along the coast of New 
oo, and similar species living on the coast at the present 
tim e referred to similar comparisons which he had made in 
Fuse: ena} he had found marked changes to have taken 
place; changes which showed that the proportions of the shells 
had greatly altered. 
e made a large number of measurements of shells from a 
few shell-hea s of Maine and Massachusetts, and had obtained 
very interesting results. The common clam a) from the 
Shell-heaps of Goose Island, Maine, Ipswich, Mass., and Marble- 
head, Mass., in compariso with recent forms of th species, 
collected in the immediate oe of these ancient deposits 
sho hat the ancient s ns were higher in comparison 
cim 
with their length see the recent apeckavons: 
A comparison of the common beach cockle Sree - om the 
shell-heaps of Marblehead, Mass., showed that the present form 
& more depressed spire t than the recent forms livi oe on the 
shore to-day, and this variation. was in accordance with observa- 
tions he had made on a similar species in Japan.—Z0. 
